806822729 has 8 divisors (see below), whose sum is σ = 815770440. Its totient is φ = 797919616.

The previous prime is 806822713. The next prime is 806822741. The reversal of 806822729 is 927228608.

It can be written as a sum of positive squares in 4 ways, for example, as 73496329 + 733326400 = 8573^2 + 27080^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 806822729 - 2⁴ = 806822713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 806822729.

It is not an unprimeable number, because it can be changed into a prime (806822789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25907 + ... + 47799.

It is an arithmetic number, because the mean of its divisors is an integer number (101971305).

Almost surely, 2^806822729 is an apocalyptic number.

It is an amenable number.

806822729 is a deficient number, since it is larger than the sum of its proper divisors (8947711).

806822729 is a wasteful number, since it uses less digits than its factorization.

806822729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22299.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 806822729 is about 28404.6251339461. The cubic root of 806822729 is about 930.9493250649.

The spelling of 806822729 in words is "eight hundred six million, eight hundred twenty-two thousand, seven hundred twenty-nine".